gallium/draw: apply DRAW_PIPE_FLAG_MASK to all vertex elements
Depending on first/last provoking vertex either the first or last
element/index may have the extra DRAW_PIPE_x flags. Mask off those
bits for all vertex elements to be safe (esp. for the quad case).
This may be overly cautious, but it's a cheap operation.
Fixes a segfault caused by large/bogus vertex indexes otherwise.
diff --git a/src/gallium/auxiliary/draw/draw_pipe.c b/src/gallium/auxiliary/draw/draw_pipe.c
index c9fd1a7..11d6485 100644
--- a/src/gallium/auxiliary/draw/draw_pipe.c
+++ b/src/gallium/auxiliary/draw/draw_pipe.c
@@ -187,14 +187,14 @@
do_triangle( draw, \
elts[i0], /* flags */ \
verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
- verts + stride * elts[i1], \
- verts + stride * elts[i2])
+ verts + stride * (elts[i1] & ~DRAW_PIPE_FLAG_MASK), \
+ verts + stride * (elts[i2] & ~DRAW_PIPE_FLAG_MASK) );
#define LINE(flags,i0,i1) \
do_line( draw, \
elts[i0], \
verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
- verts + stride * elts[i1])
+ verts + stride * (elts[i1] & ~DRAW_PIPE_FLAG_MASK) );
#define POINT(i0) \
do_point( draw, \